Refining cupola furnace



March 12, 1935. P. MARX REFINING cUPoLA FURNAGE Filed oct. 19, 1931 2 Sheets-sheet 2 FeerMarx I N VEN TOR BY Wm.

A TToRNEYsL particularly to -a cupola. furnace operated bys l electricity, oil, gas or the like fuel, such as, for 5 iPatented Mar.. 12, 1935.

PATENT ori-ica mamme '.cUPoLA mamon rem- M'arx, Henner-sieg, Germany Application October 19, 1931, Serial No. 569,759

- s claims. (ci. 26e-11) My invention relates to a cupola furnace, more instance, described in 'my Patent No. 1,911,379 of May 30, 1933, entitled CupolaI furnace.

Updto the present it has been diiiicult economic ally and eflciently to effect -th simultaneous melting and refining of the ma l to be treated, because compactly arranged furnaces of this t'ype lacked th/e clear spacenecessary for developing aygreatest possible thermal emciency. More# over, in these known furnaces the liquid material was not agitated; on account of the `lack of agita- I other residue, so that they open combustion or heat vand. it could not tion, it was Ahardly substances from said material.'

Furthermore, the construction of these furnaces made dimcult the rapid removal of the ash and remained and affected possible to separate injurious the melting and refining quality of the product.'

"'In these furnaces the readily be cooled,A resulting in a considerable increase in the costs of maintenance. l s

My invention overcomes these drawbacks, providing a rening cupola furnace for economical melting and refining in one continuous operation, heating by electric current, solid, powdered or fluid fuel.

One object of my invention is to provide4 an space between the shaft or cupola furnace proper and the rening chamber for the purpose of facilitating abundant and intense 'development of heat at a point removed from the melting material, but in direct communication withthe entire refining chamber. thereby providing efciency in transmitting the heat to the melted material.

Another object ofl my invention relates to a prede propagation of the heat and to a circulation thereof-prior toentering shaft-between refining chamber and shaft, thereby agitatingthe melting bath aroundthe removable inner part of the furnace..

Still a further object of my invention is to shape the removable inner part of the 'furnace with a corrugated to which extends into the cupola or shaft thus providing vertical openings which permit the passage of heatl and of the melted materiaL-but which do not allow the pieced charge to` slide down rom the shaft or cupola furnace.

l Another object of my invention is to provide a double-wall construction of the removable inner part as well as to provide means for cooling it,4

process as well as the i said top and the removable inner part- \thereby increasing l the life of the refractory covering.

lIn the accompanying drawings is shownan exemplary embodiment of my new furnace. I There,'- f 5 Fig. 1 is a longitudinal section Fig. 2 isfa cross section along the line 2-2 indicated in 1 Y s. 3 and 4 show longitudinal and cross sections of an electrically heated furnace.

Upon the heat chamber a enter the heat producing means, such as the burners c or the electrodes b; the refining chamber h receives the liquid, melted material. The shaft i accommodatesthe lumpy material to be melted; the 16- removable, double-walled inner part d of the furnace, has a top e whichis constructed at its cir cumference in a wave-like manner, thereby pro-- ducing openings a extending vertically between,`

wall f of the shaft and allowing 20 heat to rise and melted material to pass down.

C onduits M and N introduce into and remove from the inside of inner part d a cooling uid which is circulated as indicated by arrow heads.

4The blast is-admitted to spirali: through in- 354 let q and the heated blast issues through outlet 1' into the intermediary tuvres Z and also, by way-` of ductsy Q, into burners c.

In connection with furnaces operated by electric current it is possible introduce -.the elec- 4 trodes bA in the heat c ber a from above as well as laterally (Fig. 3)h an arc extending between the ends of said electrodes and the material. s A

By providing a particular comlqmstion oham- 45 ber around the shaft, material may be directly melted in the shaft by means of powdered or atomized fuel, and saidmaterial is subsequently refined in the refining chamber by subjecting it to a special heating, either by a fuel burnt in the 50 the furnace is charged with the pieced material to be meltedand the heating means in the heat chamber are operated. As the pieced material melts down, new material is continuously fed from the platform, said material being supported by the top e, where it is melted by the ascending iames and/ or by the heat supplied from tuyres Z. The liquid material flows through the vertical apertures g, in counter-now to the ascending heat, into the refining ,chamber h, where it is mixed and refined in revolving around the removable inner part of the furnace d. The refined material is discharged through the outlet k as required. Prior to such discharge the slag which isformed during the melting and refining process, is skimmed off through outlets A. "f

My refining cupola furnace may be ope ted by the combination of different yheating means, for instance of pulverized coke with atomized fuel, of coke with electric current, of coke with oil or gas. The furnace may also be used in `other fields, for melting glass and enamel, for instance, in the ceramic industry.

What I claim is:

l. Refining cupola furnace for carrying out the process of melting and refining metals and the like comprising a cupola shaft, a refining chamber, heat chamber arranged between said shaft and chamber, said heat chamber being in, direct communication with 'said shaft and refining chamber, a removable inner part of the furnace the top of which is shaped in a wave-like manner, thereby forming openings uniformly distributed on the periphery of said top, said openings being arranged vertically.

2. Refining cupola furnace for carrying out the process of simultaneously melting and refining metals and the `like comprising a cupola shaft, a refining chamber, a heat chamber arranged between said shaftand chamber but outwardly ofi'- set therefrom, saidf heat chamber being disposed around and in direct communication with said shaft and refining chamber, and heating means revolving the atmosphere in said heat chamber, while heating it, said atmosphere being passed over the material in said chamber and through a i contracted passage into said shaft.

' 3. Refining cupola furnace for carrying out the process of melting and refining metals and the. like comprising a cupola shaft, a refining chamber, a heat chamber arranged between said shaft and chamber, said heat chamber being in direct communication with said shaft and rening chamber, and an inner part of the furnace having its top shaped in a wave-like manner, thereby forming openings uniformly distributed on the periphery of said top, said openings being arranged vertically. I

4. Refining cupola furnace for carrying out the process of simultaneously melting and refining metals Vand the like comprising a cupola shaft, a refining chamber, a free heat chamber arranged between said shaft and chamber, said heat chamber being in direct communication with said shaft and refining chamberja hollow inner part of the furnace invertedly extending centrally up therein, and means cooling the inside of said inner part.-

5. Rening cupola furnace for carrying out the process of simultaneously melting and refining metals and the like comprising a cupola shaft, a refining chamber, a free heat chamber arranged between said shaft and chamber, said heat chamber being in direct communication with said shaft land refining chamber, a hollow inner vpart of the rfurnace invertedly extending centrally up therein, f

said part being constructed with double walls, and means cooling the inside of said inner part.

PETER MARX. 

